HYDROCHLORIC ACID SOLUTIONS CONTAINING SILICA. PART I. CONDUCTIVITY AND TRANSPORT NUMBER MEASUREMENTS

The conductance of acidified solutions containing low-molecular silica, having the same equivalent amount of alkali and the same amount of Rel. has been examined as a function of the silica concentra­tion. As the silica content increases, the conductance drops accordingly. The effect is considered as being due to adsorption of ions. This view has been supported by transport number experiments which prove that silica acts as a non-electrolyte and that the transport number of the chloride ion in these solutions is lower by about 5% than the corresponding solutions, void of silica.